<template>
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >
      <div class="title-container">
        <h3 class="title" />
      </div>

      <el-form-item prop="mobile">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.mobile"
          placeholder="Username"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button
        :loading="loading"
        type="primary"
        style="width:100%;margin-bottom:30px;"
        @click.native.prevent="handleLogin"
      >Login</el-button>

      <div class="tips">
        <span style="margin-right:20px;">账号: 13811111111</span>
        <span>密码: 246810</span>
      </div>
    </el-form>
  </div>
</template>

<script>

export default {
  name: 'Login',
  data() {
    // 校验手机号(注意不管在哪个分支成功还是失败必须调用callback)
    const validateMobile = (rule, value, callback) => {
      // 定义校验规则
      if (!/^1[3-9]\d{9}$/.test(value)) {
        callback(new Error('请输入合法的手机号'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        mobile: '13800000002',
        password: '123456'
      },
      // elementUI对于规则的定义 一般有俩种写法
      // 1. 简单校验 -> 内置校验规则
      // 2. 复杂校验 -> 自定义校验函数(可以写很多自定义的逻辑)
      loginRules: {
        mobile: [
          { required: true, message: '手机号不能为空', trigger: 'blur' },
          { validator: validateMobile, trigger: 'blur' }
        ],
        password: [
          { required: true, message: '密码不能为空', trigger: 'blur' },
          { min: 6, max: 16, message: '密码长度必须在6-16之间', trigger: 'blur' }
        ]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    // 登录回调
    handleLogin() {
      this.$refs.loginForm.validate(async valid => {
        // valid: 当所有的表单项都通过校验的时候才为true 否则就是false
        if (valid) {
          try {
            // 触发action函数
            await this.$store.dispatch('user/fetchLogin', this.loginForm)
            // 后续业务操作 1. 提示用户 2.跳转首页
            // 业务组件中写业务代码
            // action里面包含异步 这里后续的逻辑应是在登录之后才做 会等待吗？
            this.$message.success('登录成功')
            // 首页里面很多的业务场景有可能必须依赖token已经回来
            // 之所以可以加await是因为dispatch函数执行的结果同样是一个promise所以可以通过awiat模拟同步
            // 如果当前有redirect参数 就跳到对应的页面 没有就跳到首页
            const redirect = this.$route.query.redirect
            if (redirect) {
              this.$router.push(redirect)
            } else {
              this.$router.push('/')
            }
          } catch (error) {
            // 报错逻辑写到这里
          }
        }
      })
    }
  }
}
</script>

// /**
//   同一个.vue文件是支持写多个style区块的
//   带有scoped标识的只对当前组件样式生效
//   不带的内部的样式是在整个应用中都生效的,全局的 覆盖样式代码
//   在实际开发时,除了要覆盖的场景,每个组件一律加scoped
// */
<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  // 重置错误提示的字体颜色
  .el-form-item__error {
    color: #ffcb6b;
  }
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;
    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
      height: 44px;
      background: url('~@/assets/common/login-logo.png') no-repeat center;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
